.layout-container {
  width: 800px;
  height: 400px;
}

.left {
  float: left;
  width: 200px;
  height: 400px;
  border: 1px solid red;
}

.right {
  float: right;
  width: 500px;
  height: 400px;
  border: 1px solid blueviolet;
}
